Front Panel Programming Conventions - Elgar SW 5550AE Operation Manual

SW 5550AE • SW 3700AE • SW 1850AE
3.4

Front Panel Programming Conventions

•
When programming an amplitude in the Program Menu, Sequence Edit Menu,
or remotely over the GPIB, the Amplitude field is checked against the Function
(Waveform) field for positive or negative amplitude; that is, the function polarity is
used to validate the amplitude input value. For example, programming -100V
when a DC+ waveform is selected will result in an execution error.
The polarity check has the following rules:
• Negative amplitudes cannot be input for positive functions.
• Positive amplitudes cannot be input for negative functions.
• If the amplitude of a phase is positive, selecting a negative polarity function
will set the amplitude to zero.
• If the amplitude of a phase is negative, selecting a positive polarity function
will set the amplitude to zero.
•
Phases A, B, and C will be of the same frequency. A frequency change of any
phase will affect the output frequency of all phases. The frequency field is
available in all three programming screens as a convenience.
The maximum allowable frequency in both the Program Menu and the Sequence
Edit Menu is directly related to the waveforms selected in the FUNC fields of all
three phases. Some waveforms, such as Sine, have a maximum frequency limit
of 500 Hz. Others, such as Taylor, have a maximum frequency limit of 63 Hz.
Since all phases must operate at the same frequency, a Taylor waveform on
Phase A with a maximum frequency of 63 Hz will limit a Sine waveform on Phase
C to the same 63 Hz value.
For a list of factory-provided waveforms and their maximum frequencies, refer to
Section 4, Standard Waveforms.
•
A sequence can be run on one, two, or all three phases. Two different
sequences cannot be run on two phases simultaneously.
•
A sequence setting will take priority over continuous settings. When a sequence
is terminated, all programming AMPL values are set to zero (when STOP MODE
is set to zero in the SEQUENCE EXECUTE sub-menu).
Operation Manual
Operation
3-31